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N2D+/N2H+ Ratio and Evolutionary Stages of Two Protostellar Sources in B1-b

Fang-Chun Liu     2008A-A012   09/03/2008
B1-b
Spectra: Lower Sideband (left) and Upper Sideband (right). Spectra are constructed from all positively weighted data: all times, all baselines. Amplitude units are Jy/beam.



Channel map (left) at frequency of peak emission, 288.90 GHz. Contours are shown at 3,6,9 x 10% of peak emission. The vertical color bar on the right extends from image minimum (dark) to image maximum (light). Units are Jy/beam. A full width half maximum beam is shown in blue in the lower left-hand corner. All images have been cleaned down to three times the theoretical noise level. Image sizes extend out to the primary beam's half power points. Integrated-intensity map (right), constructed from all channels in s10-s21, lower sideband. Line emission has not been subtracted out. Contours are shown at 0.5,1,2,4,8 x 10% of peak emission. The vertical color bar on the right has units Jy/beam x km/s.


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